An inspection contractor found a chemical tank at a Washington state paper mill "not fit for continued service" 10 months before it failed in May.
The plume from the chemical reaction that followed the outbreak of the fire could be seen for miles
The company said the fire is contained to the refinery's property, about 40 miles west of New Orleans, and there have been no injuries.
At least one employee was injured and treated at the scene early Monday, authorities said.
A massive fire at a chemical plant in Illinois continued to burn Tuesday for a second day.
The plume of black smoke slowly disappeared overnight as crews were able to put out the tank fires at the ITC facility in Texas.
